But Juve have revealed they will not stand in the 34-year-old's way as he aims to leave Turin with a year still left on his contract.
However, Marotta insists there is no bitterness between Juve and Alves, revealing the club would allow him to leave this close-season.
"It is not a falling out, motivation is crucial to all players," Marotta told reporters.
"Dani Alves has realised that he wants to try a different experience, we will consensually rescind the contract and we wish him all the best.
"Sure there is bitterness for what he has said, but I confirm that there has been no fall out."
He had previously spent eight seasons with Barcelona, winning LaLiga six times and the Champions League on three occasions.
Alves will add to the signings of Bernardo Silva and Ederson at City.
Pep Guardiola was keen to add another right-back to his squad following the exits of Bacary Sagna and Pablo Zabaleta.